Insulated metal barrel



May 11, 1937. R. H. MADDOCK 2,080,326

INSULATED METAL BARREL `Filed Nov. 27, `1933 E mvENToR i 05527 14./Wnbooc/r B o 8' ATTORNEY UNITED STATES PATENT oFFlcE y y INsULA'rEDMETAL BARREL Robert Maddock, Cleveland, Ohio,` assignor to The MidlandSteelProducts Company, Cleveland, Ohio, a corporation of OhioApplication November 27, 1933, Serial No. 699,821

` Claims. (01.220-15) This invention relates to` new and usefulv im-Fig.` 6 is a section of another modified form of provements `ininsulated metal barrels. tap, f An important object of the invention isto pro- Fig. 7 is an enlarged section illustrating the vide a barrelhaving an` inner shell completely application of one form of shockabsorbing rings 5 spaced from and suspended in an` outer shell forapplied to the rolling ribs, I

insulating purposes by means `of heads for the Fig. 8 is a modified formof the same, inner shell which not only facilitate the assembly Fig. 9is a further modied form of the shock of the heads of the outer Shell,but also reinforce absorbing rolling ring. the chime portions and endbeadsjform substan- ReferringV now to the drawing for various de- 10tial bearing portions for the out turned flanges tails, thenumeral I0designates an outer bllged 10 of inner heads to preclude excessiveexpansion shell of mild steel or other suitable metal having Of theinner head, and provide double ange a bungholel I at the middle of oneof its sides strength between the inner and outer shell parand upon eachside `of which in the bilged porn ticularly from the standpoint ofreinforcingthe tion are formed a pail' 0f outwardly pressed inte* 10inner shell from distortion due to severe impacts gral annular ribs l2and 3.the tWO innermost 19 on the chimes and beads of the barrel, l ribsI3, due to the bilge of the barrel, having the Another important objectof the invention is greater circumference and` Consequently ferming toform' on1y the bung side of the inner she11 with the two rings uponwhich the `barrel is rolled in a bilge to facilitate complete drainageof the transportation. This outer shell is preferably container and toprovide a bung structure which formed from a flat sheet of metal rolledinto a 20 does not interfere with the ready assembly of Cylinder Withits `tWO longitudinal edges .illXtathe inner and outer shells. posed forwelding with a longitudinal seam oppo- A further object of the inventionis to provide site theside in which the bung iS provided. This a specialform of tap bush plate which is associcylindrical shell is then bilgedand the ribs I2 and ated with the heads of the inner and outer shells I3are fOllneCl` therein".` l 25 in a. manner to relieve the Weld betweenthe tap In Fig. 2 it Will be nOted that the ends 0f the bush and innershell from excessive stressestendouter shell in the completed barrel are1`0l1ed into ing to weaken the welded joints.` beads I4, but it is to beunderstood that this is A still further object of the invention is toprgthe nalassembly step in the construction of the m vide the outershell with integral rolling rings or barrel and `before the inner shellI5 iS Placed 30 hoops pressed out of the metal itself and to intherein.The chime DOltOnS 0f the enter Shell crease the section modulus of suchribs with ID are of true cylindrical form or substantially means whichare entirely free of all contact with S0 fOr a purpose WhehWillpresently appeal .the `insulated inner shell in a manner `to prevent T0DIfOteCt the Outer aS Well aS the inne!- Shell "d denting of the `outershell from distorting the against diStOItiOn due t0 the impact Oftllebarrel 35 inner shell. with other objects, reinforcing `ringsIS of subStill another object of the invention is to pro- Stantially channelSnape CTOSS Section are tted vide the rolling rings or ribs with shockabsorbing and spot `Welded at spaced intervals as indicated 4f)adjunctswhich add materially to the long life of by the numeral I'I tothe bottom of the two cen- 40 the barrel under the most adverse handlingcon` tral rolling ribs I3 with the flanges of these reinditions.`forcing rings extending inwardly as'shown in Fig. Other objects andadvantages ofthe invention 2 to increase the section modulusof `the ribsI3. will become apparent during the course of the `These reinforcingrings are not necessarily con- 45. following description. I tinuoushoops or rings but may be so if desired.

In the accompanying drawing forming a part `The inner shell I5 ofvtheinsulated barrel may of the description and wherein like partsthroughbe constructed of steel having its interior suitably outtheseveral views are referredto with correpitched or may be composed ofmetal which responding numerals. quires no pitching such as stainlesssteel, alumi- Fig. 1 is a side elevation of the improved barrel, num,Monel meal or any other material which ls 50 Fig. 2 is a longitudinalsection of the same, non-oxidizing and which will not contaminate the iiig. 3'is atop plan of the barrel, contents of the barrel. This innershell I5 is also Y Fig. 4 is an enlarged fragmentary longitudinal formedup from a fiat blank rolled into a. cylinder sectionshowing a modifiedconstruction,` and Welded along a longitudinal line lengthwise Fig. 5 isamodied formof tap. of the barrel and provided near each end with 55 aninwardly extending annular bead I8. The longitudinal half I9 of theinner shell carrying the bung 20 is bilged and this bilge merges intothe other longitudinal half of the inner shell which is substantiallycylindrical as best appreelated from Fig. 2 of the drawing. Thisconstruction provides for the complete draining of the barrel. From thisgure it will also be apparent that the ends or chimesof the inner shelldesignated by the numeral 2| beyond the beads I8 are perfectlycylindrical and do not contact in the slightest degree with any part ofthe outer shell or the end heads thereof. The bung 20 as shown is a dropforging and on its under side is grooved for the reception of theoutwardly flared edges of the bung hole II which are weldedcircumferentially to the bung as at 22. This bung 20 is much larger thanthe bung hole and is further spot welded as at 20' at several placesnear its outer margin to the inner shell to transmit stress from theouter shell to the inner at points remote from rthe circumferentialweld.

The two ends or heads 23 and 24 of the inner shell are outwardly disheddiscs of the same material as'the shell I5 and are each provided with a.surrounding annular axially extending flange 25. the margins of whichare turned outwardly and into radial flanges 26, the circumference ofwhich is slightly less than the circumference of the inner surface ofthe chime portion of the outer shell. The heads 23 and 24 are slippedinto the ends of the inner shell as far as they will go and against thebeads I8 which limit their inward movement. The flanges 25 are thencircumferentially seam welded to theV cylindrical chime portions of theinner shell to form a liquid tight container, the inner surfaces ofwhich are suitably pitched if the shell is constructed of material whichwill oxidize. One of the heads, as best seen in Fig. 6 is provided witha tap opening 21 through which the reduced end of a tap bush 28 isextended and welded at 10 on the inside of the head. This reducedportion of the bush 28 also extends through an opening in a tap bushplate 29 so that the annular shoulder of the bush overlaps the margin ofthis opening which is provided in the depressed central portion of theplate 29 to provide suicient clearance between the upper end of the bushand the walls of cavity 30 in the tap bush plate. This plate is providedwith inclined portions 60 to position its surrounding marginal portions32 against the head 24 to be welded thereto at points remote from theweld of the tap to relieve the same of stress.

The end heads 3| and 32 for the outer shell are dished outwardlyconcentrically with the inner heads so as to be spaced apart throughouttheir entire area. The top outer head 3| is provided with an aperature33 the margins of which rest upon the bridge portion 34 of the tap bushplateto be welded at its margin as indicated by the numeral 35. Bothouter heads 3I and 32' are otherwise similar in construction and each isprovided with a stepped or Z-shaped ange 36 which includes an annularaxially extending flange portion 31 substantially normal to the plane ofthe head, an intermediate radial portion 38 normal to the portion 31 andextending laterally to meet the chime portion of the outer shell with aportion 6I substantially parallel to the portion 31. .The radiallyextending flanges 26 of the inner heads 23 and 24 engage the portions 38of the outer heads to thereby completely suspend or support the innershell within the outer one with insulating space completely surroundingthe inner shell I5 and both of its heads. This insulating space may belled with suitable insulating material 80, but preferably in the form ofseaweed enclosed in paper envelopes 8| wrapped around the inner shell I5and interposed between the heads of the inner and outer shell.

The outer portions BI of flanges 36 closely contact with the innersurfaces of the chimes of the outer shell and are seam welded as at 39thereto so that the insulating space between the shells is a dead airspace and sufficient of itself to provide ample insulation for the innershell. The flange portions 6I of the outer heads of Fig. 2 do not extendalong the ends of the outer shell as far as the corresponding portions6I shown in Fig. 4, but in either event the ends of the ange portions 6Iare enclosed by rolling the extreme ends of the outer shell into beadsI4 in Fig. 2, or I4 as shown in Fig. 4. In the latter, the flangeportion 6I is of sufficient length to be rolled into a complete bead 40within the bead I4 of the outer shell. Besides strengthening the ends ofthe barrel, this bead forms a convenient hand grip at any point aroundthe circumference of either end of the barrel to facilitate handling andlifting thereof.

In assembling the inner and outer shells, one outer head 32 or 3| may bexed in one end of the outer shell and then the inner shell with its twoheads 23 and 24 welded thereto vis slipped into the outer shell with theradially extending flanges 26 of the inner ends having only slightclearance with the chime portions of the outer shell. This serves inlocating the inner shell substantially concentric with the outer onewhich of course facilitates placement of the outer heads 3I and 32 sothat the axial portions 31 slip inside of the axially extending flanges25 to completely support the inner shell while bringing their radialportions 38 into seating engagement with the radial flanges 26. Afterthe outer heads are positioned, they are circumferentially seam weldedas at 39 previously described after which the ends of the outer shellare rolled into the beads heretofore described. The edges of the bunghole II may be welded as at 4I to the outer surface of the bung 20 asillustrated in Fig. 2 before or after the heads are assembled. When thiswelding is done before the flanges of the outer heads are welded to theouter she1l,`this connection of the two shells serves in locating theinner shell centrally of the outer shell. Incase insulating material isused between the shells, it can be wrapped around the vinner shell priorto its assembly in the outer shell and the lateral anges 26 prevent theinsulation from being dragged off of the inner shell with its slidingcontact with the outer shell. It will be noted in Fig. .4 that the innershell I5 is devoid of any head locating beads I8 since in thismodification the radially extending flange 26 of each head will abut theend of the inner shell to limit movement of the head inwardly of theshell to thereby accurately position it and determine the capacity ofthe barrel.

Figs. 7 to 9 inclusive show various modifications of shock absorbingrings applied to the two cen tral rolling ribs I3. Fig. 7 discloses acontinuous fiat elastic rubber band 42 which when stretched over rib I3,conforms to the contour thereof and is retained in position by theinherent resiliency of the band. In Fig. 8, a flexible band 43 of anysuitable material, but preferably possessing elascanized to asubstantially flat metal band 44.

which in turn may be welded to the exterior of the rolling rib I3.y InFig. 9, the roll-ing ribs located as are the ribs I3, are formed with anexterior arcuate seat 45 on opposite sides of which are outwardlyconverging surfaces 46 of the rib whereby a continuous flexible ring 41preferably of circular cross section and possessing inherent Aresilienceis applied to the rib by rolling the same along the barrel and up aninclined wall to seat in the arcuate seat 45 oi the rib, where it maybe, if desired, cemented or vulcanized in place. In this form oi rollingrib 46, the inner channel shaped reinforcing ring 48 is of correspondingcross section to fit the contour of the integral rib 46 and is spotwelded thereto.

In Fig. 6 is shown a modied form of tap plate and tap bush which is thesame as the bush 28 heretofore described with the exception that thebottom 29 of the depression 30 is welded in any suitaiie manner aroundthe edges of the opening 2'I in the inner head 24. Furthermore, a gasket50 is placed in the bottom of the cavity 30 for liquid tight sealingengagement with the bottom of tap 28I which is provided with aconcentric annular threaded flange 5I for screw threaded engagement withthreads provided on the side walls of the depression. In this manner thetap bush 28 can be readily renewed if and when required.

In Fig. 5 a modification ofthe foregoing type of tap bush and plate isillustrated which is useful when the inner shell and heads are made fromnon-oxidizable material and the inner head 24 tpformed with a hanged tapopening for projection through the tap opening in the bush plate to bebent down and around the edges thereof asindicated at 52.` Thisdispenses with the necessity of a welded joint at this point since apliable l'lbber gasket 53 may be squeezed down upon this ange to overlapthe same, and fill the cavity by means of the pressure exerted byscrewing the tap bush 28' into the cavity of the tap plate.

From the foregoing it will be seen that the radial anges 26 of the innershell perform many functions. First they serve in locating the innershell concentrically within and spaced from the outer shell. Secondlythey form footing on the radial portions 38 of the outer heads to resistmovement of the inner shell. Insulation 90, Fig. 4 may be disposedbetween these portions 31 and 3l and the ilanges 26 to further insulatethe inner shell from the outer one. Thirdly, the ilanges 26 formconilning means for insulation 80 to prevent it from wrinkling or beingpulledoif of the inner shell when being inserted with the latter intothe outer shell. Fourthly, they add much strength to the ends of theinner shell. Fifth, they limit telescoping of the outer heads -into theinner heads and the inner heads into the inner shell and therebydetermine the capacity of the inner shell and nx the spacing of theouter heads from the inner heads. By reason of the ends 6I of theflanges of the outer heads being enclosed within the beads I4 and I4',stress directed toward the seam welds 39 from impact is absorbed by thebeads. i

It will of course be understood that vario changes in the shape andarrangement of parts may be resorted to without departing from the scopeof the appendedclaims.`

I claim:

l. A double walled barrel comprising an outer shell, having chimes, aninner shell completely spaced from the same, heads for the inner shellhaving radially extending annular flanges the outer edges of which haveslight clearance from the chimes ofthe outer shell and serving to retainthe heads and ends of the inner shell substantially concentric with theouter shell, and -heads for the outer shell having annular oisetportions in which said flanges are seated to centralize the inner headsand shell and to space the major portions of the outer heads from theinner heads.

2. A double walled barrel comprising an outer shell having rolledchimes, an inner shell completely spaced from the same, heads for theinner shell having laterally extending annular anges the outer edges ofwhich have slight clearance from the chimes of the outer shell andserving to retain the heads and ends of the inner shell substantiallyconcentric with the outer shell, and heads for the outer shell havingannular offset portions in which said iianges areseated to centralizethe inner heads and to space the major portions of them from the outerheads, the edges of said outer heads being enclosed within rolled chimesof the outer shell.

3. A double walled barrel comprising an outer shell having chimes, aninner shell completely spaced from the same, heads for the inner shellhaving radially extending annular flanges the outer edges of which haveslight clearance from the chimes of the outer shell and serving toretain the heads and ends of the inner shell substantially concentricwith the outer shell, heads for the outer shell having annular oisetportions in which said flanges are seated to centralize the inner shelland to space'the major portions of the outer heads from the inner heads,and insulating material disposed between said offset portions of theouter head and said laterally extending ilanges of the inner head,

4. A double walled barrel comprising an outer shell having a chimeportion, an inner shell completely spaced from the walls of the shell, ahead for the inner shell having an axially extending flange terminatingin a radially extending flange, the edge of which is arranged within andspaced from the outer shell, a head for the outer shell spaced from theinner head and having an axial ilange contacting the axial ange of theinner head, said outer head `having a radial portion forming a seatingportion for the corresponding portion of the inner head, and said outerhead having a second axial iiange welded to the chime portion of theouter shell, thereby forming the sole support of said inner shell andhead spaced from the outer shell.

5. A double walled barrel comprising an outer shell having a chimeportion, an inner shell completely spaced from the walls of the shell, ahead for the inner shell having an axially extending shell.

ROBERT H. MADDOCK.

